import RPi.GPIO as GPIO
import time

# Pin setup
SENSOR_PIN = 17  # Soil moisture sensor pin
PUMP_PIN = 27    # Relay + pump pin

GPIO.setmode(GPIO.BCM)
GPIO.setup(SENSOR_PIN, GPIO.IN)
GPIO.setup(PUMP_PIN, GPIO.OUT)

print("Smart Plant Watering System Started...")

try:
    while True:
        soil_state = GPIO.input(SENSOR_PIN)
        if soil_state == 0:  # Dry soil
            print("Soil is dry → Watering plant...")
            GPIO.output(PUMP_PIN, True)
            time.sleep(5)  # Run pump for 5 sec
            GPIO.output(PUMP_PIN, False)
            print("Watering complete")
        else:
            print("Soil is wet → No need to water.")
        time.sleep(10)  # Check every 10 sec
except KeyboardInterrupt:
    print("Exiting program...")
    GPIO.cleanup()